@function bg-image($image-path, $repeat: no-repeat, $position: center center, $size: 100% 100%) {
    $bg: url($image-path);

    @if $repeat !=no-repeat {
        $bg: $bg + ' ' + $repeat;
    }

    @if $position !=center center {
        $bg: $bg + ' ' + $position;
    }

    @if $size !=100% 100% {
        $bg: $bg + ' / ' + $size;
    }

    @return $bg;
}
/**
div{
background:bg-image('images/logo.png');
}
*/
@mixin font-style($size, $family, $color,$line-height) {
   font-size: $size;
   font-family: $family;
   color: $color;
   line-height: $line-height;
}
/**
.heading {
    @include font-style(24px, 'Helvetica, Arial, sans-serif', #333, 1.5);
}
*/
